Mitsubishi Denki Kabushiki Kaisha

Kyouhei Yamamoto

Toshinori Tanaka

Akihiro Daikoku

Akihiko Imagi

Yoshio Yoshikuwa

Ryuichi Ikeda

Mitsuyuki Tsumura

Yoshihito Asao

Yuji Nakahara

Kazuhisa Takashima

Shigekazu Sakabe

Keiichi Fukazawa

Kiyohide Okamoto

Kei Yonemori

Katsumi Ohata

Kengo Fujimoto

Shuji Isono

Yuusuke Matsui

Satoru Akutsu

Masafumi Okazaki

Nobuaki Miyake

Yusuke Matsui

Hideki Megata

Masayoshi Yamamoto

Shinsuke Hemmi

Shinsuke Henmi

Osamu Waku

Hisato Sakaguchi

Harumi Inoue

A method for manufacturing an armature including securing a core to the shaft having a plurality of slots extending in the axial direction formed on the outer circumferential surface thereof, forming a coil composed of a plurality of coil portions by simultaneously winding wires a plurality of turns around a pair of slots separated by a predetermined number of slots and offsetting each of the coil portions one slot at a time in the circumferential direction of the core, securing a commutator to the shaft having a plurality of segments, adjacent coil portions having a slot along one side thereof, wherein a number of vacant slots between adjacent ones of the coil portions within each of simultaneously-wound coil portion groups is nonuniform, and electronically connecting segments which should have the same electric potential by means of equalizing connectors so that each of pairs of the coil portions that should have the same electric potential has a substantially equal electric potential.

Method for manufacturing an armature for a dynamo-electric machine

A rotating electric machine which includes: a stator having a stator core fixed inside a bottomed frame and a stator winding wound around the stator core; a bracket fixed to an opening side of the frame; a rotor having a shaft penetrating the bracket and rotatably supported by a bracket side bearing and by a frame side bearing, the rotor being arranged inside the stator core interposing a gap therebetween; a respective phase lead wire electrically connected to the stator winding and led out from the bracket; a rotation sensor that detects a rotational position of the rotor; and a sensor signal wire connected to the rotation sensor and led out from the bracket. A front end portion of the respective phase lead wire is introduced to inside the bracket from outside an opening portion provided at the bracket, thereby electrically connecting to the stator winding.

Rotating electric machine and manufacturing method thereof

The method for resolving the stator having a coil disposed in the slots provided around an inner circumferential face of a cylindrical iron core and having an opening portion includes a step of enlarging the opening portion of the slot, and a step of extracting the coil from the slot.

Stator and resolving method and device thereof

An electro-hydraulic power steering apparatus in which a control device, a motor and a pump are integrated. The apparatus includes a first housing, a second housing, a control device surrounded by the first and second housings, a motor disposed on a side of the first housing and a pump disposed on a side of the second housing. The motor includes a rotor, a stator and a frame. The rotor has a first bearing supported by the first housing. The frame includes an inner circumferential face into which a stator core is press fitted and receives a second bearing of the rotor. The frame is secured to the first housing by a first clamp screw. The first housing and the second housing are secured by a second clamp screw. The first and second clamp screws are tightened from the hand of the frame.

Electro-hydraulic power steering apparatus

Terminal plates are located in a brush holder base, a spring and a brush are located in the brush holder base, and the terminal plates are connected to pigtails in an area within 90&#xb0; in a backside of an introducing portion of the pigtails in the brush, whereby operating noise and ripples of torque of a dynamo-electric machine are reduced.

Brush holder for dynamo-electric machine

An electro-hydraulic power steering apparatus includes: a motor having a rotational shaft and provided with a bearing for rotatably bearing the rotational shaft; a hydraulic pump disposed at one end of the rotational shaft of the motor and driven by the motor; a first elastic body for supporting the bearing; and a second elastic body for pressing the bearing in an axial direction.

A method for manufacturing an armature including securing a core to the shaft having a plurality of slots extending in the axial direction formed on the outer circumferential surface thereof, forming a coil composed of a plurality of coil portions by simultaneously winding wires a plurality of turns around a pair of slots separated by a predetermined number of slots and offsetting each of the coil portions one slot at a time in the circumferential direction of the core, securing a commutator to the shaft having a plurality of segments, adjacent coil portions having a slot along one side thereof, and electrically connecting segments which should have the same electric potential by means of equalizing connectors so that each pairs of the segments that should have the same electric potential has a substantially equal electrical potential.

Method for manufacturing an armature for a dynamo-electric machine having offsetting and overlapping coils

A surface of a commutatoris rubbed by a shakedown brushother than ordinary brushesto produce a carbon coat, whereby a shakedown process can be reduced or abolished.

Rotary electric machine and a method of producing the same

An armature includes a plurality of equalizing connectors for permanently electrically connecting pairs of commutator segments that should have the same electric potential, so that each of the pairs of the commutator segments that should have the same electric potential has a substantially equal electrical potential. In one embodiment, at least one pair of adjacent coil portions share a common slot.

Armature for a dynamo-electric machine having offsetting and overlapping coils

An brush assembly is provided in which electric power losses in brushes are reduced, thereby suppressing an abnormal or excessive rise in temperature of the brushes. A tip end of a lead wire inserted into a corresponding brush in a direction of pressing upon press molding thereof is embedded in the brush in such a manner that it extends over two thirds or more of the length in the pressing direction of the brush

Brush assembly

The present invention provides a dynamo-electric machine that prevents the lead portions of the coil portions disposed at places, at which mechanical balance is provided, from intersecting each other, that enhances the workability in manufacturing the wiring by wiring a conductor, and that suppresses the defective insulation of the winding. This dynamo-electric machine for use in an electric power steering system has a yoke, n (incidentally, &ldquo;n&rdquo; is a common divisor of the number of the magnetic poles and the number of the slots and equal to or more than 2) of the coil portions are parallel-connected between the segments. Moreover, the coil portions are disposed in such a manner as to be symmetrical with respect to a mechanical angle of 360 degrees. Lead parts of the coil portions other than one of the coil portions, which is nearest in a circumferential direction to each of the segments, are drawn therefrom in the same circumferential direction.

Dynamo-electric machine

Brush motor for electric power steering system

The present invention provides a dynamo-electric machine that suppresses vibrations caused by imbalance due to electromagnetic forces and that also suppresses imbalance in magnetic attraction forces generated owing to the difference in the number of coil portions among electric circuit portions. This dynamo-electric machine comprises an armature having a winding consisting of a plurality of coil portions each formed by lap-winding a conductor between a corresponding pair of slots formed in an outer circumferential surface portion of a core fixed to a shaft in such a way as to extend in an axial direction thereof, a commutator fixed to an end portion of the shaft and having a plurality of segments to which both end sections of said coil portions are electrically connected, brushes made to respectively abut against the surfaces of the segments of the commutator, and equalizers for connecting said segments, which are to be at equal electric potential, to each other. Moreover, the coil portions are parallel-connected to one another between the segments, and disposed in such a manner as to be symmetrical with respect to a mechanical angle of 360 degrees.

Growing community of inventors

Tokyo, Japan

Kyouhei Yamamoto